MX623 查看數據表（PDF） - MX-COM Inc
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MX623 Datasheet PDF : 6 Pages
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Line- Powered Call Progress Detector
3
Application Information
MX623 Preliminary Information
VDD
C5
DATA OUTPUTS
Q3
A HEX Code
Q2
Output representing
the decoded tone
frequency --
Q1
See Table 1
Q0
1
2
3
4
VDD
5
COMPOSITE SIGNAL IN
SIGNAL IN
6
C2
7
XTAL
8
16
15
14
13
MX623P
12
11
10
9
DATA CHANGE
CS
IRQ
PURS
HOLD
VSS
XTAL/CLOCK
X1
C3
R2
C4
VDD
C1
R1
Component
R1
R2
C1
C2
Value
1.0MΩ
1.0MΩ
.047µF
.0047µF
Figure 2 - Recommended External Components
Hex Output Code
Character Q3 Q2 Q1 Q0
0
0000
1
0001
2
0010
3
0011
4
0100
5
0101
6
0110
7
0111
8
1000
9
1001
A
1010
B
1011
C
1100
D
1101
E
1110
F
1111
Band Edges (Hz) Nominal
Lower Upper Center
Edge Edge Freq.
364
386
375
488
520
500
520
580
550
580
618
600
386
412
400
412
436
425
436
463
450
463
487
475
900
1273
1350
1750
1008
1325
1455
1855
950
1300
1400
1800
2062 2140 2100
frequency not guaranteed
frequency not guaranteed
NOTONE
Table 1 - Tone Decode Frequencies
Component
Value
C3
33.0pF
C4
33.0pF
C5
1.0µF
X1
3.579545MHz
Tolerances R = ±10%, C = ±20%
Timing Information
With CS Low - Figure 3
After initial power-up and the Hold input inactive (High),
as frequencies are input, with the Data Change output
as an active (High) indicator, the data is presented at
the Data Outputs.
If/when the Hold input is placed active (Low), the data
at the Data Outputs is frozen and the Data Change
output held High at its next active excursion -until the
Hold input is returned High.
With the Hold input held High - Figure 4
As frequencies are input a correct decode will produce
an active (Low) interrupt level.
This interrupt (IRQ) is serviced and reset by an active
(Low) CS input.
Note the ‘valid data’ period at the Data Outputs.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480091.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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